[interpreter] Bytecode register optimizer.

test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden

Index: test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden
diff --git a/test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden b/test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden
index bfb879b7f12931060d05649e3ee170ea3fcd12d3..d2d3fbcb3b0238909799d20f796acbef618b0e1b 100644
--- a/test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden
+++ b/test/cctest/interpreter/bytecode_expectations/ClassDeclarations.golden
@@ -16,7 +16,7 @@ snippet: "
 "
 frame size: 9
 parameter count: 1
-bytecode array length: 74
+bytecode array length: 73
 bytecodes: [
                 B(LdaTheHole),
                 B(Star), R(1),
@@ -33,9 +33,8 @@ bytecodes: [
                 B(Star), R(5),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(2), U8(4),
                 B(Star), R(2),
-                B(LdrNamedProperty), R(2), U8(1), U8(1), R(3),
-                B(Ldar), R(3),
-                B(Mov), R(3), R(4),
+                B(LdaNamedProperty), R(2), U8(1), U8(1),
+                B(Star), R(3),
                 B(LdaConstant), U8(2),
                 B(Star), R(5),
                 B(CreateClosure), U8(3), U8(0),
@@ -44,6 +43,7 @@ bytecodes: [
                 B(Star), R(7),
                 B(LdaZero),
                 B(Star), R(8),
+                B(Mov), R(3), R(4),
                 B(CallRuntime), U16(Runtime::kDefineDataPropertyInLiteral), R(4), U8(5),
                 B(CallRuntime), U16(Runtime::kToFastProperties), R(2), U8(1),
                 B(Star), R(0),
@@ -69,7 +69,7 @@ snippet: "
 "
 frame size: 9
 parameter count: 1
-bytecode array length: 74
+bytecode array length: 73
 bytecodes: [
                 B(LdaTheHole),
                 B(Star), R(1),
@@ -86,9 +86,8 @@ bytecodes: [
                 B(Star), R(5),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(2), U8(4),
                 B(Star), R(2),
-                B(LdrNamedProperty), R(2), U8(1), U8(1), R(3),
-                B(Ldar), R(3),
-                B(Mov), R(3), R(4),
+                B(LdaNamedProperty), R(2), U8(1), U8(1),
+                B(Star), R(3),
                 B(LdaConstant), U8(2),
                 B(Star), R(5),
                 B(CreateClosure), U8(3), U8(0),
@@ -97,6 +96,7 @@ bytecodes: [
                 B(Star), R(7),
                 B(LdaZero),
                 B(Star), R(8),
+                B(Mov), R(3), R(4),
                 B(CallRuntime), U16(Runtime::kDefineDataPropertyInLiteral), R(4), U8(5),
                 B(CallRuntime), U16(Runtime::kToFastProperties), R(2), U8(1),
                 B(Star), R(0),
@@ -124,7 +124,7 @@ snippet: "
 "
 frame size: 10
 parameter count: 1
-bytecode array length: 128
+bytecode array length: 127
 bytecodes: [
                 B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
                 B(PushContext), R(2),
@@ -147,9 +147,8 @@ bytecodes: [
                 B(Star), R(6),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(3), U8(4),
                 B(Star), R(3),
-                B(LdrNamedProperty), R(3), U8(3), U8(1), R(4),
-                B(Ldar), R(4),
-                B(Mov), R(4), R(5),
+                B(LdaNamedProperty), R(3), U8(3), U8(1),
+                B(Star), R(4),
   /*   75 E> */ B(LdaContextSlot), R(context), U8(4),
                 B(ToName),
                 B(Star), R(6),
@@ -159,14 +158,15 @@ bytecodes: [
                 B(Star), R(8),
                 B(LdaSmi), U8(1),
                 B(Star), R(9),
+                B(Mov), R(4), R(5),
                 B(CallRuntime), U16(Runtime::kDefineDataPropertyInLiteral), R(5), U8(5),
-                B(Mov), R(3), R(5),
   /*  106 E> */ B(LdaContextSlot), R(context), U8(5),
                 B(ToName),
                 B(Star), R(6),
                 B(LdaConstant), U8(3),
                 B(TestEqualStrict), R(6),
-                B(JumpIfFalse), U8(7),
+                B(Mov), R(3), R(5),
+                B(JumpIfToBooleanFalse), U8(7),
                 B(CallRuntime), U16(Runtime::kThrowStaticPrototypeError), R(0), U8(0),
                 B(CreateClosure), U8(5), U8(0),
                 B(Star), R(7),
@@ -198,7 +198,7 @@ snippet: "
 "
 frame size: 7
 parameter count: 1
-bytecode array length: 73
+bytecode array length: 74
 bytecodes: [
                 B(CallRuntime), U16(Runtime::kNewFunctionContext), R(closure), U8(1),
                 B(PushContext), R(2),
@@ -219,7 +219,8 @@ bytecodes: [
                 B(Star), R(6),
                 B(CallRuntime), U16(Runtime::kDefineClass), R(3), U8(4),
                 B(Star), R(3),
-                B(LdrNamedProperty), R(3), U8(1), U8(1), R(4),
+                B(LdaNamedProperty), R(3), U8(1), U8(1),
+                B(Star), R(4),
                 B(CallRuntime), U16(Runtime::kToFastProperties), R(3), U8(1),
                 B(Star), R(0),
                 B(Star), R(1),
@@ -227,8 +228,8 @@ bytecodes: [
                 B(LdaConstant), U8(2),
                 B(Star), R(4),
                 B(CallRuntime), U16(Runtime::kThrowReferenceError), R(4), U8(1),
-                B(Star), R(3),
-  /*   94 E> */ B(New), R(3), R(0), U8(0),
+  /*   94 E> */ B(Star), R(3),
+                B(New), R(3), R(0), U8(0),
   /*  103 S> */ B(Return),
 ]
 constant pool: [